Power Supply User Manual

Chapter 4: CF-6801 Cooling Frame Failure Conditions
22 6800/7000 Series - Frames and Power Supplies Installation and Operation Manual
Failure Conditions
Remove power to the fan tray unit immediately if both the red and green
LEDs are
extinguished as this indicates a short circuit failure condition.
Extended duration of this condition will cause damage to both the fan tray
circuitry and the external power supply.
Follow the instructions to turn off the power to the fan tray:
1. Pull the black locking pins on each end of the FR-6804(-1) front
panel until they snap out of position. These pins remain attached to
the panel.
2. Slide the front panel out and tilt down.
3. The 6804PS power supply is located on the right side of the frame.
Turn the ON/OFF switch to the OFF position.
4. Close the FR-6804(-1) front panel and snap the locking pins back
into position. Power to the CF-6801 is now removed.
5. Check that air is being drawn in through the front panel of the FR-
6804(-1).
T he CF-6801 consists of a buck converter and linear devices that are used
for monitoring parameters. The system is equipped with over-voltage,
under-voltage, over-current, under-current, and over-temperature sensing
protection.
(See the LED condition description table on page 21 .)